package im.actor.crypto.primitives.curve25519;

public class fe_isnonzero {

//CONVERT #include "fe.h"
//CONVERT #include "crypto_verify_32.crypto_verify_32.h"

/*
return 1 if f == 0
return 0 if f != 0

Preconditions:
   |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
*/

static final byte[] zero = new byte[32];

public static int fe_isnonzero(int[] f)
{
  byte[] s = new byte[32];
  fe_tobytes.fe_tobytes(s,f);
  return crypto_verify_32.crypto_verify_32(s,zero);
}


}
